fix cache key computation (fixes #15096)

bijoe/visualization/utils.py

@@ -82,7 +82,7 @@ class Visualization(object):
 
     @property
     def key(self):
-        l = []
+        l = [self.cube.engine.warehouse.name, self.cube.name]
         for kw, values in self.filters.iteritems():
             if values:
                 if isinstance(values, dict):